Crash opening TM-DistanceFields in editor on Mac

[2017.07.05-19.18.12:519][607]LogMac: Error: appError called: Assertion failed: Assertion failed: ShaderRef != NULL && *ShaderRef != nullptr [File:Runtime/ShaderCore/Public/Shader.h] [Line: 1448] 
Failed to find shader type FShadowObjectCullPS in Platform SF_METAL_SM5

SIGSEGV: invalid attempt to access memory at address 0x3

[2017.07.05-19.18.12:531][607]LogSlate: Took 0.000103 seconds to synchronously load lazily loaded font '../../../Engine/Content/Editor/Slate/Fonts/DroidSansMono.ttf' (77K)
[2017.07.05-19.18.12:532][607]LogMac: FGenericPlatformMisc::RaiseException(unsigned int) Address = 0xdb8bf7b  (filename not found) [in UE4Editor-Core.dylib]
FOutputDeviceMacError::Serialize(wchar_t const*, ELogVerbosity::Type, FName const&) Address = 0xdda48bf  (filename not found) [in UE4Editor-Core.dylib]
FOutputDevice::Logf(wchar_t const*, ...) Address = 0xde8af2d  (filename not found) [in UE4Editor-Core.dylib]
FDebug::AssertFailed(char const*, char const*, int, wchar_t const*, ...) Address = 0xddde01e  (filename not found) [in UE4Editor-Core.dylib]
FShadowObjectCullPS* TShaderMap<FGlobalShaderType>::GetShader<FShadowObjectCullPS>() const Address = 0x1f1979c2 (filename not found) [in UE4Editor-Renderer.dylib]
CullDistanceFieldObjectsForLight(FRHICommandListImmediate&, FViewInfo const&, FLightSceneProxy const*, FMatrix const&, int, FPlane const*, FVector4 const&, float, TUniquePtr<FLightTileIntersectionResources, TDefaultDelete<FLightTileIntersectionResources> >&) Address = 0x1f125516 (filename not found) [in UE4Editor-Renderer.dylib]
FProjectedShadowInfo::BeginRenderRayTracedDistanceFieldProjection(FRHICommandListImmediate&, FViewInfo const&) Address = 0x1f152e83 (filename not found) [in UE4Editor-Renderer.dylib]
FProjectedShadowInfo::RenderRayTracedDistanceFieldProjection(FRHICommandListImmediate&, FViewInfo const&, IPooledRenderTarget*, bool) Address = 0x1f1538f8 (filename not found) [in UE4Editor-Renderer.dylib]
FSceneRenderer::RenderShadowProjections(FRHICommandListImmediate&, FLightSceneInfo const*, IPooledRenderTarget*, bool, bool) Address = 0x1f851753 (filename not found) [in UE4Editor-Renderer.dylib]
FDeferredShadingSceneRenderer::RenderShadowProjections(FRHICommandListImmediate&, FLightSceneInfo const*, IPooledRenderTarget*, bool&) Address = 0x1f851dc6 (filename not found) [in UE4Editor-Renderer.dylib]
FDeferredShadingSceneRenderer::RenderLights(FRHICommandListImmediate&) Address = 0x1f250df3 (filename not found) [in UE4Editor-Renderer.dylib]
FDeferredShadingSceneRenderer::Render(FRHICommandListImmediate&) Address = 0x1f1007c1 (filename not found) [in UE4Editor-Renderer.dylib]
FRendererModule::BeginRenderingViewFamily(FCanvas*, FSceneViewFamily*)::EURCMacro_FDrawSceneCommand::DoTask(ENamedThreads::Type, TRefCountPtr<FGraphEvent> const&) Address = 0x1f787e30 (filename not found) [in UE4Editor-Renderer.dylib]
TGraphTask<FRendererModule::BeginRenderingViewFamily(FCanvas*, FSceneViewFamily*)::EURCMacro_FDrawSceneCommand>::ExecuteTask(TArray<FBaseGraphTask*, FDefaultAllocator>&, ENamedThreads::Type) Address = 0x1f7ec200 (filename not found) [in UE4Editor-Renderer.dylib]
FNamedTaskThread::ProcessTasksNamedThread(int, bool) Address = 0xdbaf90f  (filename not found) [in UE4Editor-Core.dylib]
FNamedTaskThread::ProcessTasksUntilQuit(int) Address = 0xdbae918  (filename not found) [in UE4Editor-Core.dylib]
FTaskGraphImplementation::ProcessThreadUntilRequestReturn(ENamedThreads::Type) Address = 0xdbaa6a1  (filename not found) [in UE4Editor-Core.dylib]
RenderingThreadMain(FEvent*) Address = 0xfef6cb1  (filename not found) [in UE4Editor-RenderCore.dylib]
FRenderingThread::Run() Address = 0xff0c5d7  (filename not found) [in UE4Editor-RenderCore.dylib]
FRunnableThreadPThread::Run() Address = 0xdc2e300  (filename not found) [in UE4Editor-Core.dylib]
FRunnableThreadPThread::_ThreadProc(void*) Address = 0xdbd0340  (filename not found) [in UE4Editor-Core.dylib]
_pthread_body() Address = 0xaaa8993b (filename not found) [in libsystem_pthread.dylib]
_pthread_body() Address = 0xaaa89887 (filename not found) [in libsystem_pthread.dylib]
thread_start() Address = 0xaaa8908d (filename not found) [in libsystem_pthread.dylib]